#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
#include<string.h>
#include<time.h>
#include<assert.h>
int my_strlen(const char *a)
{
	char* n = &*a;
	assert(a);
	while (*a!='\0')
	{
		a++;
	}
	return a - n;
}
int main()
{
	char arr[] = "hello word!";
	printf("%d", my_strlen(arr));
	return 0;
}